1、Multi Function: This board expands the port into a 3P interface, could plug it directly into 3P sensor module, with 14 digital ports (6 PWM ports) and 6 analog ports. 2、Communication Interface: For Xbee encapsulated Bluetooth, WIFI and for Xbee communication modules can be inserted in the middle of this expansion board. 3、Storage Module Interface: This expansion board is also set the expansion interfaces of ordinary Bluetooth module, for APC and storage card. 4、Support External Power Expansion: The terminal at the corner supplies power to main controller and expansion board, and the central terminal supplies power to steering gear on digital port. 5、2 Power Supplies: This expansion board is 3V 5V switchable to adapt to different operating voltages of the controller. 1 x Sensor Expansion Board Item Type: Sensor Expansion BoardMaterial: PCBCompatible with: For MGEA, for DUEPower Supply: 3.3V 5V switchableInterface: I2CTechnical Support: For XBEE, for APC220 communication module and storage card read and write